diff --git a/scripts/form-differences.py b/scripts/form-differences.py
new file mode 100644
index 0000000..f89e196
--- /dev/null
+++ b/scripts/form-differences.py
@@ -0,0 +1,87 @@
+#!/usr/bin/env python2
+
+"""List the ways that pokemon forms differ from one another.
+
+This is not a one-shot script! It is probably unmaintained though.
+"""
+
+from pokedex.db import connect
+import pokedex.db.tables as t
+from sqlalchemy.orm import lazyload, joinedload, subqueryload
+
+session = connect()
+#session.bind.echo = True
+
+def getstats(stats):
+    return dict((stat.stat_id, stat.base_stat) for stat in stats)
+
+def geteffort(stats):
+    return dict((stat.stat_id, stat.effort) for stat in stats)
+
+def getpokeathlon(stats):
+    return dict((stat.pokeathlon_stat_id, (stat.minimum_stat, stat.base_stat, stat.maximum_stat)) for stat in stats)
+
+def getitems(items):
+    return list(sorted((item.version_id, item.item, item.rarity) for item in items))
+
+def getmoves(moves):
+    return list(sorted((move.version_group_id, move.move_id, move.pokemon_move_method_id, move.level, move.order) for move in moves))
+
+def getform(form):
+    return {
+        'ability': form.pokemon.all_abilities,
+        'items': getitems(form.pokemon.items),
+        'moves': getmoves(form.pokemon.pokemon_moves),
+        'pokeathlon': getpokeathlon(form.pokeathlon_stats),
+        'stats': getstats(form.pokemon.stats),
+        'effort': geteffort(form.pokemon.stats),
+        'types': form.pokemon.types,
+        'exp': form.pokemon.base_experience,
+        'weight': form.pokemon.weight,
+        'height': form.pokemon.height,
+    }
+
+def gcd(a, b):
+    keys = set(a.keys()) & set(b.keys())
+    result = {}
+    for k in keys:
+        if a[k] == b[k]:
+            result[k] = a[k]
+    return result
+
+q = session.query(t.PokemonSpecies)
+q = q.options(
+    lazyload('default_pokemon'),
+
+    joinedload('forms'),
+    lazyload('forms.pokemon'),
+)
+
+for species in q.all():
+    forms = species.forms
+
+    if len(forms) == 1:
+        continue
+
+    forms = (session.query(t.PokemonForm)
+        .join(t.Pokemon)
+        .filter(t.Pokemon.species_id==species.id)
+        .options(
+            joinedload('pokemon'),
+            joinedload('pokemon.all_abilities'),
+            joinedload('pokemon.items'),
+            joinedload('pokemon.stats'),
+            joinedload('pokemon.types'),
+            joinedload('pokeathlon_stats'),
+            subqueryload('pokemon.pokemon_moves'),
+            lazyload('pokemon.pokemon_moves.pokemon'),
+            lazyload('pokemon.pokemon_moves.move'),
+        )
+        .all()
+    )
+
+    keys = set(getform(forms[0]).keys())
+    common_keys = set(reduce(gcd, map(getform, forms)).keys())
+    unique_keys = keys - common_keys
+
+    print "{}: {}".format(species.name, ", ".join(sorted(unique_keys)))